Question 614394
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Hi, 
A student gets 4 points for a correct answer, but loses 3 points for an incorrect answer. 
A history exam with 100 multiple choice questions.
Let x and (100-x) represent the number right and wrong respectively
Question states***scored a total of 225 points
 4x -3(100-x) = 225
      x = 75, the number answered correctly, 25 answered incorrectly